1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b17413861dfc2e358705bc9955c3f6a1642f9c940239e3a7ec651990706e5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1273cfc6-d3a1-4c1b-a5d7-fba59c490d8a.json and https://artists.proofprofile.net/proofs/artist/1273cfc6-d3a1-4c1b-a5d7-fba59c490d8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
木村好夫のギター演歌 〜昭和の名曲コレクション〜
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd8662a4ff0d4b2d08394ae0673b5f618c92faaedf0e8061f507517a4472f9b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR07701850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2190dbf08d6e8791ee74b4ba2898cbd31d268c0757b2ab9b1f88aba84aba6c17. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR07901810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9f6b478c46f2b99951176ea7c31e66e679f7aad2c568e98bde35b62667376f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08401840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1141891f20bb2e5211efd6fa3ec900cc5aa6f8894844332d0d43c1bdc7c4131. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08402270.
木村好夫のギター演歌 〜昭和の名曲コレクション 2〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dccd52f65df41d7b3643102e9e24aae8b170e8af5801db618c403a6e1ce9ed6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR09514010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc469599dca96511484953342d54259f22d41190881d8c851969a95c9d0a557. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR07850110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867054339280774a51c43c9ef485185d4b84d06277686ef1f2df4a2295be457. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08050080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61cb903f065e9e2e944d1602af9ee48917e6efb2a352afe13ca1f7b15fe7660. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08450080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639d3fbe7a5f81cf4ae14673ea68ed764601512ab25b5d2897fba497bfd380cc. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08250050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba62e8754bb56085865f8f6f001426dce2b2eff0a3eb60a72543bb5c748959a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR07701880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd11bd37e8625186b66ed83184066d6df337d8330abd1c64a10082a8994ce69b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08002340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979b106ce29b5ea08cc4824e282d42d7f93660552e2ec70f9f610cc065947dfe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08050070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713637677a557dbd32f742be18a48a3236562d2cf4c559c2acbfd5ba9824ac7f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR09513940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0653e47a7ed93096a44e2b80fbf43766e5e33c6aeb8cc4897d04b0e49a53c3a1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR09300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ddb5f1e7f25be958b414bf764c2e4b19de0234dca54cb3db9d68f2d028ae02. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR07701900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ed317bee25929b17cd7349ea2f37a209212f2971a7b1c13ef650418402ec7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08002350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7548ec8eec62ceab84305c0e52bc789cb117a46bba2545aaa779e628d9352c4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08402320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f1af8446f4cb74a95346d881154cd19f36260a92f4e89bca4695297c0c5199. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR08603250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5aa5e8af87027dc49999516a19822760fc2de2c81261743f2ce13e8eaacc72. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCR09603800.
木村好夫のギター演歌～平成の名曲コレクション～